How much pressure is exerted by a sample of gas at 85.0 °C if the same volume exerts a pressure of 1.00 atmospheres at a temperature of 20.0 °C? I'm pretty sure this is a Combined law question but not so sure, I have other questions with other laws but I am mostly stuck on the Combined Laws.
I'm not the best at mathematics so can someone please lead me in the right direction for these, it would be greatly appreciated, thanks :)

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

The table lists the lattice energies of some compounds. compoundlattice energy (kj/mol)lif            –1,036licl            –853naf            –923kf            –821nacl            –786which statement about crystal lattice energy is  best  supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf. the lattice energy increases as the cations get larger, as shown by lif and licl. the lattice energy decreases as cations get smaller, as shown by nacl and naf. the lattice energy decreases as the cations get smaller, as shown by naf and kf.